1.

Ablock of mass 2kg fall freely from rest through adistance of 3m. Find the kinetic energy of the block?

Answer»

The kinetic energy of the block is 58.8 JExplanation:m = 2 kgS = 3 MU = 0 m/s (the BODY is INITIALLY at rest)a = 9.8 m/ (acceleration due to gravity)From the third law of motion : = 2 X 9.8 x 3    = 58.8 K.E. = 1/2 m        = 1/2 x 2 x 58.8        = 58.8 J



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